我正在使用WPF的DevComponents TabNavigation控件,并且能够在特定索引处将TabItem添加到TabNavigation,在代码隐藏中将其称为i。现在我想通过执行以下操作使新的TabItem成为SelectedItem:
private void textBlock_MouseLeftButtonDown(object sender, MouseButtonEventArgs e)
{
int i = createNewTabItem(0, "Foo");
TabNavigation tn = (((sender as TextBlock).Parent as Grid).Parent as TabItem).Parent as TabNavigation;
tn.SelectedItem = tn.Items[i];
}
private int createNewTabItem(int overflowSrcPageNum, String header)
{
TabItem ti = new TabItem();
ti.Header = header;
tabNavigation.Items.Insert(overflowSrcPageNum + 1, ti);
return overflowSrcPageNum + 1;
}
然而,当我运行此代码时,不是将新的TabItem带入视图,而是将其置于视图中,然后我所在的原始选项卡会快速移回视图。
如果有人对于为什么会这样做有任何想法,以及我如何解决它,请告诉我。我附上了以下XAML的样本:
<Grid >
<Grid.Resources>
<ResourceDictionary>
<Style TargetType="TextBlock">
<Style.Triggers>
<Trigger Property="IsMouseOver" Value="True">
<Setter Property="TextDecorations" Value="Underline"></Setter>
</Trigger>
</Style.Triggers>
<Setter Property="Foreground" Value="White" />
<Setter Property="FontFamily" Value="Segoe UI" />
<Setter Property="FontSize" Value="11" />
<Setter Property="FontWeight" Value="Bold" />
<Setter Property="HorizontalAlignment" Value="Right" />
<Setter Property="Text" Value="View More..." />
<Setter Property="Visibility" Value="Visible" />
<EventSetter Event="MouseLeftButtonDown" Handler="lblMoreCpartys_MouseLeftButtonDown" />
</Style>
</ResourceDictionary>
</Grid.Resources>
<my:TabNavigation Background="Black" HorizontalAlignment="Stretch" Margin="0" Name="tabNavigation"
VerticalAlignment="Stretch" MouseLeftButtonDown="tabNavigation_MouseLeftButtonDown"
FontSize="12" Foreground="SteelBlue" ForceCursor="True" MouseWheel="tabNavigation_MouseWheel"
TabStripPlacement="Bottom">
<TabItem Header="ITEM 1" Name="firstTabItem" FontSize="12" >
<TextBlock Name="firstTB" />
</TabItem>
<TabItem Header="ITEM 2" Name="secondTabItem" FontSize="12" >
<TextBlock Name="secondTB" />
</TabItem>
</my:TabNavigation>
</grid>
提前致谢。
答案 0 :(得分:0)
尝试在textBlock_MouseLeftButtonDown中将e。Handled设置为True。
我不熟悉那个控件,但是如果它像TabControl一样工作,那么它有一个逻辑可以在单击时将选项卡置于视图中。该逻辑看到原始选项卡被单击,并在更改后将其重新显示。将EventArgs对象标记为Handled将阻止WPF调用父元素上的事件处理程序,这将阻止选项卡切换回来。